Manufacture of glass articles.



F. L. O. WADSWORTH. MANUFAGTURE 0F GLASS ARTICLES.

AFPLIOATION FILED 00T. lI 1903.

3 SHEETS-SHEET 1.

INVEN'TOR WITNESSES `No.V 789,302. PATLNTLD MAY 9, 1905.

F. L. 0. WADSWORTH. MANUFASTUSL 0F GLASS ARTICLES. y

APPLICATION FILED 00T.1, 1903.

' 3 SHEETS-SHEET 2.

No. 789,302. PATENTBD MAYQ, 1905.

P. L. 0. WADSWORTH.

. MANUFACTURE OF GLASS ARTICLES. APPLICATION FILED 00T.1. 190s.

3 SHEETS-SHEET 3.

` Wim/5555:

[Nl/ENTOR 3J. a QJJ/ the accompanying drawings,

zowshows a grooved roller which v mg the sheet preparatory to no.t/eaaoa.v

vPatented May 9, 1905.

Paritair Gwinn.

'1U PRESSFD PRlSM PLATE GLASS CUMPANY, UF

NEW'` YORK, N. Y., A.

CORPORA'HN @F WFS'P VlRGrlNlA.

MANUFAGTUHE @F GLASS Nld'l'lh.,

SPECIFICATION forming part of Letters Patent No. 789,362, dated Mayg,1905. ppli'oation'led October 1, 1903- Serial No. 175,297.

To a/Z whom it may concern:

' Be it known that I, FRANK L. O. WADswonrn, of Allegheny, Alleghenycounty,

Pennsylvania, have invented a new and useful improvement in theManufacture of Glass Articles, of which the following is a full, clear,and exact description, reference being had to forming part of thisspecification, in which- Figure 1 shows, in side elevation, artly invertical section, a machineadapte for the practice of my invention. Fig.2 is a verticalcross-sectlon on the line l Il of Fig. 1, showing one endof the roll in section. Fig. 3 is a sectional view showing a glass platewith projecting ribs formed thereon by the machine shownv infFig. 1, andFig. 4illustrates the subsequent operation in which thes'e ribs areflattened by a roller. Fig. 5 `may b e eme ployed in the preliminaryoperation of spreadforming and sha ing the rojections thereon bypressing; an Fig. 6 ustrates the subsequent operation in which therelative position of the roller and glass plate has been shifted, so asto bring the ribs of the plate opposite to the plain portion of theroller by which these ribs are flattened. Fig. 7 shows in section aglass tile made in accordance with my invention and held in lace bycement. Fig. 8 is a detail view s owing' in section the A ressing-die ofFigf 1 in the position which 1t occupies at the end of the operation ofpressing the projections on a sheet which has been spread reliminar byrolling. Fi 9 shows the said die in t e position whicli it occupiesafter it has been shifted laterall preparatory to the final operation ofremol ing the pressed projections. Fi 10 shows another apparatus foraccomp ishing the final step of remoldin the pressed-sheet by turningthe pressingto change the portion of the pressing-surface which comesinto contact with the pressed figures on the glass.

My invention is primarily designed for the manufacture of glass tileshaving ribs or proie horizontally, so asj ections formed on the rearsurface and fiattened or widened at their ends, so as to form keys forholdingthe tiles to a bed of cement.

My invention in one of its features consists in an operation embodyingat least three -steps-namely, first, spreading a body of glass intosheet form, then mol ing the sheet with projections or ribs on itssurface, and then flattening the molded projections or ribs.

lt also consists in practicing these steps when the relative position ofthe glass sheet and the molding instrument are changed after theprojections or figures have been formed, and the molding-surface isremolded or refigured by bringingdifferent portions of it again intocontact with the molding-sure face.

By the intermediate step of pressing the rojections on the surface ofthe sheet before attening or remoldingxthem l am enabled to secureprojections w ich are very sharply dened and may be made narrow, whereasif this step were omitted and it were atn tempted to employ a two-stepoperation of rolling the projections and then flattenin theml theprojections would be obtuse an badly defined and generally uniitfor thepurpose for which they are intended. By first spreading the sheet byrolling I am enabled to make the sheet of any desired size, and thiscould not be done if t 1e preliminary rolln ing operation were omitted.

Figs. 1, 2, 3, and 4 illustrate one form of the ap aratus for thepractice of my invention. n these iigures 2 is a table on which the bodyof plastic glass 3 to-be molded is placed. This table is mounted uponstandards 4, adapted to be moved vertically, preferably by a cylinder 5,and intermediate connecting mechanism, which consists, preferably, of apitman 19, connected with the piston and connected by levers 6 and rods20 to shafts 21 which by levers 22 and links 23 are connected tovertical slides 24, by which the table is guided in its vertical motion.The cylinder is provided with suitable fluid-,supply connections, therise of the table being efl'cct- -its anis for the purpose ofadjustment. This *isl not necessary where the roll isplain, but isemployed Where it' is gro`oved, as 4described ed bythe admission offluid and its descent being eilected by gravity. The position of thetable .when at itslowest pointis deter.

mined by an adj ust'able' stop consisting,`preierably, oi an eccentric7, which isadaptedsto be engaged by and to stop part ofthe coniiectingmechanism 6. 8 is a carriage on which a moldingplate 9 is mounted and ispreferably backed yieldingly by springs 10,A andV on 'the carriage is aroll 1-1, which mayl have a plain 'lace andis rotated by suitablev powerconnections 12. The carriage is capableofhorizontal motion to bring theroll 11 andI plate 9 successivelyover thejtable .2,

and Jorthis purpose l may employ oil-the table driven pinions 13, whichengage With stationary racks-14E.

' The roll 11 may be movable lengthwise oi below. Such adjustmentmay beeffected by 'mounting the roll slidingly on its shaft with a;

lreyway 15 and providing anut 16 and screw-V vshaft 17 for moving it.

` The opera-tion isas Jfollows?Thetable '2 is set iii its lowestposition permitted by the ec- ,centric 7 which has been adjusted bya-hanprojections 18 it acts thereon atright angles 4dle 7 to secure thedesired thickness of glass,4

the plastic glass is placed thereon, 'andthe carriage S .is advancedsoas to move the rollA ,11 over the glass and to spread it .upon the tableinto a flat sheet; Further 'advance of.

the carriage moves theroll beyondthetable and brings over the glass themolding-plate 9, whose under surface is formed with grooves of suitableshape to impress upon-the glass the desired ribs or projections. Then.by ac-l tuatiiig the cylinder 5 the'tableis raised, and` the glasssheet, being pressed thereby against the plate 9, is molded with theprojections or ribs 18 shown in 3. The tableis. then Alowered by reverseoperation of'the cylinder,

and .the stop 7 is adjusted so as to permit it to descend farther thanthe position which it occupied during` the operation' of the roll. Thecarriage 8 is then moved in they reverse direction, so as to carrytheroll 11 overthe molded glass sheet, and as the surface offth'e rollcomes into contact with the edges of the to the surface ofthe sheetandiiattens or eX- pands the projections into the form of keys' 18, asshown in Fig. 4. The shaping of the glass sheet is thus completed, andafter the I necessary annealing and `cutting 4it is ready. for use astiles, as shown in Fig. 7

ln the modified apparatus shown in Figs. 5

and 6 the roll 11 is form'ed'with grooves b,

the purpose of which is not to form ribs or projections to inalshape,but simply to make prominences on the sheet r'eliminary to the secondstep of molding wit the die 9.

The grooves' of the die are brought directlyv above the proininences, sothat the thickened VLthe prominences also enables Ythe molding 0p' -u onthe projections and employed for pressingand molding the vglass sheetitis shifted laterally,"'so` as to `machine, and the shifting' oftheldie Athe vdie laterallybetwee'n the irst a'iidsecono portions of theglass at those places will more readily till the grooves and enable thedie 'to be made with deeper grooves than would otherwise be practicable.The presence of' eration to beperformed with the least possible dislacement ofthe glass in the grooves, and this tends to secure sharperdeinition'of the ribs on the finished sheet and to preventmolecularstraining oil-the` dass.

y The third o eration zofl onthe glasss eetjby means of theg'roovedroller 5 is accomplished, as illustrated in Fig.

Y6, by shifting the roller endwisey so as to bring thevintermediateplain portions c 'directly tol above the proj ections- 18a, and afterthedie has been retracted passing the rollagain over ortions4 willuact'` the glass, v'when the plainV atten or expand t em. 1

'Iii Figs. Sand-9, Ishowmy'nvention modi- 'third step ofthe'm'ethom'fasWellasthe sec#v ond step.- In this caseafter the diej'hasbeen Vribs onbring theungrooved yportions of the vdie directly above the -ribs ontheglass, andthe glass and'diefa're thenbrought into molding contact rforthe pur ose of flattening ytheprojections. When t manner' of'prac'ticinge grooves lonl the face fof as to' extend transversely to the length ofthe be .performed by moving the carriagpjsliglkitly in a longitudinaldirection on its trac ere the grooves. on the die eXtendlongitudinally,in the directionof` the traveling motion-of the f die, means should "beprovided for shifting Stepsoflthe method, f lnstead oshiitinglthe diemright [miesas vabove described,` I vmay employ the means..

shown inF-ig.V 10`7 in which t e die 94 is sup' .ported by4 a'swiveledconnection Qjonwhich it may be turnedina horizontal By thus turningit'slightly between t secondsteps of the method the grooves aretakenout' of register with the molded projec tions ontheglass, and whenthe glass and die' plane.

*are then brought into in' lding contacttlie myinventionemploye'd withtheapparatus 1 shown in Fig.11,t

the'die 9 should ,be cliangedV Yin direction' so IOO ie iirst and undthen reshaping the surface of the proj ec- Contact with e differentportion of the nloldro tions; substantmlly as described. ing-surface;substantially as described.'

2. The method of making glzlss articles In testimony whereof I hevehereunto set whilch consists in irst molding 1tcihe surfaoeof my hand.u, g ass smet to a certain con guration 1 n' means of-pressure, thenremoving the Inol FRANK L' O' WADMVORI H' ing-s'face and altering therelatlve position Witnesses: of sheet and'molding-surface, aznd finallyre- J oHN- MILLER, shaping the molded sheet by bringing it into H. M.CoRWIN.

